CARC Code
223
Mandated Law/Regulation Adjustment
Payment was adjusted based on a federal, state, or local law or regulation that doesn't have its own specific adjustment code yet. This is a temporary code used until a permanent one is created for that particular regulation.
contractualHow to resolve this denial
Accept mandated regulatory adjustment; see RARC for specific regulation
- 1
Review the remittance advice to confirm the adjustment amount is accurate
- 2
Verify the contractual write-off against your fee schedule
- 3
Post the adjustment to the patient account
- 4
Do not balance bill the patient for this contractual reduction
- 5
Document the adjustment in your billing system
▶✓ Pre-action checklist — verify before contacting the payer
Review the full remittance advice (ERA/EOB) for additional RARC codes that explain the denial.
Verify the claim was submitted with correct patient eligibility and benefit information.
Check if this denial applies to a specific line item or the entire claim.
▶More about CO-223 — stats, related codes, appeal template
99%
Recovery Rate
1-3 days
Avg. Resolution
Easy
Difficulty
Rare
Frequency
Payer-Specific Notes
How major payers handle CARC 223 by specialty.
UnitedHealthcare
Review UHC's online claim status tool for additional detail on this adjustment.
Appeal Letter Template
Generic appeal template for CARC 223 denials.
We are submitting a formal appeal for claim [CLAIM_NUMBER] for patient [PATIENT_NAME], date of service [DOS]. This claim was denied/adjusted with CARC 223 indicating: "Adjustment code for mandated federal, state or local law/regulation not covered ." We have reviewed the claim and are providing the attached documentation to support reconsideration. [SUPPORTING_DOCUMENTATION]. Please reconsider payment per the terms of our contract.
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